.net InstallUtil utility - 32 bit vs 64 bit

Question

I've got a windows service compiled as AnyCPU. I'm trying to get it into our installer to distribute. However... I am unclear on the difference between the 32 bit and 64 bit versions of InstallUtil. Does anyone know what (if any) there are?

On my 64 bit machine, I can run either the $(WinDir)\Microsoft.NET\Framework64\v2.0.50727 or the $(WinDir)\Microsoft.NET\Framework\v2.0.50727.

In both cases, the resulting service Process in Task Manager does not have the *32 flag applied to it.

Only the 32 bit InstallUtil works on 32 bit machines (obviously).

Is there a need to use the \Framework64\ version of InstallUtil? What does it do differently?

Answer 1

According to this, you are supposed to use the 64 bit version to install 64-bit and MSIL assemblies, but it doesn't say why.

I believe here explains why. If you look at the bottom of the post, it explains some differences between the two and when to use the 32-bit intallutil.